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I am new to Magento.I have created a payment method , it is showing in magento admin panel but not showing in checkout page.

etc/adminhtml/system.xml

<?xml version="1.0"?>

<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Config:etc/system_file.xsd">

    <system>

        <section id="payment">

            <group id="Newpayment" translate="label" type="text" sortOrder="1" showInDefault="1" showInWebsite="1" showInStore="1">

                <label>Newpayment</label>

                <field id="active" translate="label" type="select" sortOrder="10" showInDefault="1" showInWebsite="1" showInStore="0">

                    <label>Enabled</label>

                    <source_model>MagentoConfigModelConfigSourceYesno</source_model>

                </field>

                <field id="title" translate="label" type="text" sortOrder="20" showInDefault="1" showInWebsite="1" showInStore="1">

                    <label>Title</label>

                </field>

                <field id="int_id" translate="label" type="text" sortOrder="21" showInDefault="1" showInWebsite="1" showInStore="1">

                    <label>Merchant ID</label>

                </field> 

                <field id="mer_id" translate="label" type="text" sortOrder="22" showInDefault="1" showInWebsite="1" showInStore="1">

                    <label>Merchant Settlement ID</label>

                </field>

                <field id="mer_dis_name" translate="label" type="text" sortOrder="23" showInDefault="1" showInWebsite="1" showInStore="1">

                    <label>Merchant Display Name</label>

                </field>

                <field id="merchant_priv_key" translate="label" type="text" sortOrder="30" showInDefault="1" showInWebsite="1" showInStore="0">

                    <label>Merchant Private Key</label>

                    <backend_model>MagentoConfigModelConfigBackendEncrypted</backend_model>

                </field>

                <field id="merchant_pub_key" translate="label" type="text" sortOrder="30" showInDefault="1" showInWebsite="1" showInStore="0">

                    <label>Merchant Public Key</label>

                    <backend_model>MagentoConfigModelConfigBackendEncrypted</backend_model>

                </field>

                <field id="api_key" translate="label" type="text" sortOrder="50" showInDefault="1" showInWebsite="1" showInStore="0">

                    <label>API Key</label>

                </field>

                <field id="debug" translate="label" type="select" sortOrder="85" showInDefault="1" showInWebsite="1" showInStore="0">

                    <label>Debug</label>

                    <source_model>MagentoConfigModelConfigSourceYesno</source_model>

                </field>

                <field id="environment" translate="label" type="select" sortOrder="30" showInDefault="1" showInWebsite="1" showInStore="0">

                    <label>Environment</label>

                    <source_model>MagentoNewpaymentModelEnvironment</source_model>

                    <config_path>payment/Newpayment/environment</config_path>

                </field>

                <field id="sort_order" translate="label" type="text" sortOrder="160" showInDefault="1" showInWebsite="1"

                       showInStore="0">

                    <label>Sort Order</label>

                    <frontend_class>validate-number</frontend_class>

                </field>

            </group>

        </section>

    </system>

</config>

etc/config.xml

<?xml version="1.0"?>



<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Store:etc/config.xsd">

    <default>

        <payment>

            <Newpayment>

                <debug>1</debug>

                <active>1</active>

                <model>MagentoNewpaymentModelNewpayment</model>

                <sandbox_url>https://test.Newpayment.com/pg/pay</sandbox_url>

                <production_url>https://secure.Newpayment.com/pg/pay</production_url>

                <environment>sandbox</environment>

                <merchant_priv_key backend_model="MagentoConfigModelConfigBackendEncrypted" />

                <merchant_pub_key backend_model="MagentoConfigModelConfigBackendEncrypted" />

                <order_status>pending_payment</order_status>

                <title>Payment method (Newpayment)</title>

                <currency>INR</currency>

                <can_authorize>0</can_authorize>

                <can_capture>1</can_capture>

                <can_void>0</can_void>

                <can_use_checkout>1</can_use_checkout>

                <is_gateway>1</is_gateway>

                <sort_order>1</sort_order>

                <redirect_url>Newpayment/standard/redirect</redirect_url>

                <return_url>Newpayment/standard/response</return_url>

                <cancel_url>Newpayment/standard/cancel</cancel_url>

            </Newpayment>

        </payment>

    </default>

</config>

etc/module.xml

<?xml version="1.0"?>



<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/module.xsd">

    <module name="Magento_Newpayment" setup_version="2.0.0">

        <sequence>

            <module name="Magento_Sales"/>

            <module name="Magento_Payment"/>

            <module name="Magento_Checkout"/>

        </sequence>

    </module>

</config>

etc/payment.xml

<?xml version="1.0"?>



<payment xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

         xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Payment:etc/payment.xsd">

    <methods>

        <method name="Newpayment">

            <allow_multiple_address>1</allow_multiple_address>

        </method>

    </methods>

</payment>

view/frontend/layout/checkout_index_index.xml

<?xml version="1.0"?>

<page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" layout="1column" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd">

    <body>

        <referenceBlock name="checkout.root">

            <arguments>

                <argument name="jsLayout" xsi:type="array">

                    <item name="components" xsi:type="array">

                        <item name="checkout" xsi:type="array">

                            <item name="children" xsi:type="array">

                                <item name="steps" xsi:type="array">

                                    <item name="children" xsi:type="array">

                                        <item name="billing-step" xsi:type="array">

                                            <item name="component" xsi:type="string">uiComponent</item>

                                            <item name="children" xsi:type="array">

                                                <item name="payment" xsi:type="array">

                                                    <item name="children" xsi:type="array">

                                                        <item name="renders" xsi:type="array">

                                                            <!-- merge payment method renders here -->

                                                            <item name="children" xsi:type="array">

                                                                <item name="Newpayment" xsi:type="array">

                                                                    <item name="component" xsi:type="string">Magento_Newpayment/js/view/payment/Newpayment</item>

                                                                    <item name="methods" xsi:type="array">

                                                                        <item name="Newpayment" xsi:type="array">

                                                                            <item name="isBillingAddressRequired" xsi:type="boolean">true</item>

                                                                        </item>

                                                                    </item>

                                                                </item>

                                                            </item>

                                                        </item>

                                                    </item>

                                                </item>

                                            </item>

                                        </item>

                                    </item>

                                </item>

                            </item>

                        </item>

                    </item>

                </argument>

            </arguments>

        </referenceBlock>

    </body>

</page>

view/frontend/web/js/view/payment/method-render/Newpayment.js

define(

        [

            'Magento_Checkout/js/view/payment/default',

            'Magento_Newpayment/js/action/set-payment-method',

        ],

        function (Component,setPaymentMethod) {

            'use strict';



            return Component.extend({

                defaults: {

                    template: 'Magento_Newpayment/payment/form',

                },

                redirectAfterPlaceOrder: false,



                afterPlaceOrder: function(){

                    setPaymentMethod();

                }

            });

        }

    );

view/frontend/web/js/view/payment/Newpayment.js

define(

    [

        'uiComponent',

        'Magento_Checkout/js/model/payment/renderer-list'

    ],

    function (

        Component,

        rendererList

    ) {

        'use strict';

        rendererList.push(

            {

                type: 'Newpayment',

                component: 'Magento_Newpayment/js/view/payment/method-renderer/Newpayment'

            }

        );

        return Component.extend({});

    }

);

view/frontend/web/template/payment/form.html

<div class="payment-method" data-bind="css: {'_active': (getCode() == isChecked())}">

    <div class="payment-method-title field choice">

        <input type="radio"

               name="payment[method]"

               class="radio"

               data-bind="attr: {'id': getCode()}, value: getCode(), checked: isChecked, click: selectPaymentMethod, visible: isRadioButtonVisible()"/>

        <label class="label" data-bind="attr: {'for': getCode()}">

            <span data-bind="text: getTitle()"></span>

        </label>

    </div>



    <div class="payment-method-content">

        <!-- ko foreach: getRegion('messages') -->

        <!-- ko template: getTemplate() --><!-- /ko -->

        <!--/ko-->

        <div class="payment-method-billing-address">

            <!-- ko foreach: $parent.getRegion(getBillingAddressFormName()) -->

            <!-- ko template: getTemplate() --><!-- /ko -->

            <!--/ko-->

        </div>

        <div class="checkout-agreements-block">

            <!-- ko foreach: $parent.getRegion('before-place-order') -->

            <!-- ko template: getTemplate() --><!-- /ko -->

            <!--/ko-->

        </div>



        <div class="actions-toolbar">

            <div class="primary">

                <button class="action primary checkout"

                        type="submit"

                        data-bind="

                        click: placeOrder,

                        attr: {title: $t('Place Order')},

                        enable: (getCode() == isChecked())

                        " disabled>

                    <span data-bind="i18n: 'Continue'"></span>

                </button>

            </div>

        </div>

    </div>

</div>

registration.php

<?php



MagentoFrameworkComponentComponentRegistrar::register(

    MagentoFrameworkComponentComponentRegistrar::MODULE,

    'Magento_Newpayment',

    __DIR__

);